After your outbound leg - go in your record on CO.com - locate your itinerary and add your OP number - it should now take over your account - When you check in online 24 hrs. before flight check to see if you are on the upgrade list - IF NOT then call CO Reservations and get them to do it manually - if they balk which they may - do it at the airport at check in. You should have a good shot as Plat on a W fare.